Changes since 1.6:
 . Use shared json {,de}serialization functions from genom3 common tmpl files
 . Update the serialization format for sequences/arrays
 . Provide a more efficient implementation of the JSON serialization code
 . Add the description of the options supported by the C client
 . Return more informative mwerr exception when csClientInit fails in the C
   client.
 . Add a protection against NULL pointer deref in json_error client function
 . Fix inconsistent genom3 requirements in configure script (always 2.99.24...)
 . Catch up with changes in codels/client interface of genom-2.99.24